refactor: rename ScadaLink → ZB.MOM.WW.ScadaBridge (code + projects + namespaces)

Solution + 23 src projects + 26 test projects renamed; folders, csproj,
namespaces, and ScadaLinkDbContext/ScadaBridgeDbContext class updated.
ActorSystem "scadalink" → "scadabridge", Akka seed-node URLs migrated.
SQL roles/logins, LDAP domains, CLI command name, and CLI config dir
(~/.scadalink → ~/.scadabridge) also renamed.

Build green; 5 Host.Tests fail awaiting SQL login rename in next commit.
Pre-existing StaleTagMonitor timing flakes unchanged.

Rename script committed at tools/rename-to-scadabridge.sh.

src/ZB.MOM.WW.ScadaBridge.HealthMonitoring/ISiteHealthCollector.cs

@@ -0,0 +1,172 @@
+using ZB.MOM.WW.ScadaBridge.Commons.Messages.Health;
+using ZB.MOM.WW.ScadaBridge.Commons.Types;
+using ZB.MOM.WW.ScadaBridge.Commons.Types.Enums;
+
+namespace ZB.MOM.WW.ScadaBridge.HealthMonitoring;
+
+/// <summary>
+/// Interface for site-side health metric collection.
+/// Consumed by Site Runtime actors to report errors, and by DCL to report connection health.
+/// </summary>
+public interface ISiteHealthCollector
+{
+    /// <summary>
+    /// Increments the script error count.
+    /// </summary>
+    void IncrementScriptError();
+
+    /// <summary>
+    /// Increments the alarm error count.
+    /// </summary>
+    void IncrementAlarmError();
+
+    /// <summary>
+    /// Increments the dead letter count.
+    /// </summary>
+    void IncrementDeadLetter();
+
+    /// <summary>
+    /// Audit Log (#23) Bundle G — increment the per-interval count of
+    /// <c>FallbackAuditWriter</c> primary failures. Bridged from the
+    /// <c>IAuditWriteFailureCounter</c> binding registered via
+    /// <c>AddAuditLogHealthMetricsBridge()</c>.
+    /// </summary>
+    void IncrementSiteAuditWriteFailures();
+
+    /// <summary>
+    /// Audit Log (#23) M5 Bundle C — increment the per-interval count of
+    /// payload-filter redactor over-redactions (header / body / SQL
+    /// parameter stage throws routed to the
+    /// <c>&lt;redacted: redactor error&gt;</c> marker). Bridged from the
+    /// <c>IAuditRedactionFailureCounter</c> binding registered via
+    /// <c>AddAuditLogHealthMetricsBridge()</c>.
+    /// </summary>
+    void IncrementAuditRedactionFailure();
+
+    /// <summary>
+    /// Audit Log (#23) M6 Bundle E (T6) — replace the latest site-local
+    /// audit-queue backlog snapshot (pending count, oldest pending row,
+    /// on-disk file bytes) used by the next <see cref="CollectReport"/> call.
+    /// Refreshed periodically by the <c>SiteAuditBacklogReporter</c> hosted
+    /// service so each report carries a recent point-in-time view of the
+    /// site→central drain health.
+    /// </summary>
+    /// <param name="snapshot">The audit backlog snapshot.</param>
+    void UpdateSiteAuditBacklog(SiteAuditBacklogSnapshot snapshot);
+
+    /// <summary>
+    /// Updates the health status for a data connection.
+    /// </summary>
+    /// <param name="connectionName">The name of the connection.</param>
+    /// <param name="health">The connection health status.</param>
+    void UpdateConnectionHealth(string connectionName, ConnectionHealth health);
+
+    /// <summary>
+    /// Removes a connection from health tracking.
+    /// </summary>
+    /// <param name="connectionName">The name of the connection.</param>
+    void RemoveConnection(string connectionName);
+
+    /// <summary>
+    /// Updates tag resolution metrics for a connection.
+    /// </summary>
+    /// <param name="connectionName">The name of the connection.</param>
+    /// <param name="totalSubscribed">Total number of subscribed tags.</param>
+    /// <param name="successfullyResolved">Number of successfully resolved tags.</param>
+    void UpdateTagResolution(string connectionName, int totalSubscribed, int successfullyResolved);
+
+    /// <summary>
+    /// Updates the endpoint for a connection.
+    /// </summary>
+    /// <param name="connectionName">The name of the connection.</param>
+    /// <param name="endpoint">The connection endpoint.</param>
+    void UpdateConnectionEndpoint(string connectionName, string endpoint);
+
+    /// <summary>
+    /// Updates tag quality metrics for a connection.
+    /// </summary>
+    /// <param name="connectionName">The name of the connection.</param>
+    /// <param name="good">Number of good quality tags.</param>
+    /// <param name="bad">Number of bad quality tags.</param>
+    /// <param name="uncertain">Number of uncertain quality tags.</param>
+    void UpdateTagQuality(string connectionName, int good, int bad, int uncertain);
+
+    /// <summary>
+    /// Sets the store-and-forward buffer depths for all categories.
+    /// </summary>
+    /// <param name="depths">Dictionary mapping category names to their buffer depths.</param>
+    void SetStoreAndForwardDepths(IReadOnlyDictionary<string, int> depths);
+
+    /// <summary>
+    /// Sets the counts of instances in each state.
+    /// </summary>
+    /// <param name="deployed">Number of deployed instances.</param>
+    /// <param name="enabled">Number of enabled instances.</param>
+    /// <param name="disabled">Number of disabled instances.</param>
+    void SetInstanceCounts(int deployed, int enabled, int disabled);
+
+    /// <summary>
+    /// Sets the count of parked messages.
+    /// </summary>
+    /// <param name="count">The number of parked messages.</param>
+    void SetParkedMessageCount(int count);
+
+    /// <summary>
+    /// Sets the hostname of this node.
+    /// </summary>
+    /// <param name="hostname">The node hostname.</param>
+    void SetNodeHostname(string hostname);
+
+    /// <summary>
+    /// Sets the list of cluster nodes.
+    /// </summary>
+    /// <param name="nodes">The list of cluster node statuses.</param>
+    void SetClusterNodes(IReadOnlyList<Commons.Messages.Health.NodeStatus> nodes);
+
+    /// <summary>
+    /// Sets whether this node is the active node in the cluster.
+    /// </summary>
+    /// <param name="isActive">True if this node is active, false otherwise.</param>
+    void SetActiveNode(bool isActive);
+
+    /// <summary>
+    /// Gets whether this node is the active node in the cluster.
+    /// </summary>
+    bool IsActiveNode { get; }
+
+    /// <summary>
+    /// Collects and returns a health report for a site.
+    /// </summary>
+    /// <param name="siteId">The site identifier.</param>
+    /// <returns>A health report for the specified site.</returns>
+    SiteHealthReport CollectReport(string siteId);
+
+    /// <summary>
+    /// HealthMonitoring-017: atomically add back the given per-interval error
+    /// counts into the collector's accumulators. Called by the report sender
+    /// when transport delivery of a freshly-collected report fails, so the
+    /// counts that <see cref="CollectReport"/> already drained roll forward
+    /// into the next report rather than being silently lost. Concurrent
+    /// increments arriving between the failed Send and this restore are
+    /// preserved — <c>Interlocked.Add</c> sums correctly with them. The
+    /// default interface implementation is a no-op so existing test fakes
+    /// (the only implementations outside <see cref="SiteHealthCollector"/>)
+    /// continue to compile without per-fake updates; production callers see
+    /// the real behaviour via the concrete class.
+    /// </summary>
+    /// <param name="scriptErrors">Script error count to add back.</param>
+    /// <param name="alarmErrors">Alarm evaluation error count to add back.</param>
+    /// <param name="deadLetters">Dead letter count to add back.</param>
+    /// <param name="siteAuditWriteFailures">Site audit write failure count to add back.</param>
+    /// <param name="auditRedactionFailures">Audit redaction failure count to add back.</param>
+    void AddIntervalCounters(
+        int scriptErrors,
+        int alarmErrors,
+        int deadLetters,
+        int siteAuditWriteFailures,
+        int auditRedactionFailures)
+    {
+        // Default no-op so test fakes do not need to be updated. The real
+        // SiteHealthCollector overrides this with the Interlocked.Add restore.
+    }
+}